Pump



l/. 1929- c. H. EDWARDS 1,713,501

PUMP

Filed June 23, 1924 4 Sheets-Sheet 1 INVENTOR,

ATTORNEYS. I

Curl/1i if. Eduardo;

i May 14, 1929. c. H. EDWARDS PUMP Filed June 23, 1924 4 Sheets-Sheet 2 Illlilllllliilllllill y 1929', c. EDWARDS 1,713,501

PUMP

Fi led June 2:5, 1924 4 sheets-sheet 3 IN V EN TOR, Curtis fl. Edwards A TTORNEYS.

Patented May 14, 1929.

umrao STATES 1,113,501 PATENT OFFICE.

CURTIS H. EDWARDS, LOS ANGELES, CALIFORNIA, ASBIGNOR TO BOYLE-DAYTON CO., 0] LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA.

Pour.

Application filed June 23,

This invention relates to pumps, and in particular to certain mechanism used to control the filling of a pump cylinder with liquid in such a manner that the cylinder cannot be filled with a liquidwhile liquid is being discharged from the cylinder.

The invention has for an object the provision of a pump which assures a purchaser of liquids, such as gasoline, that he is obtaining a determined amount of such liquid.

In practicing the invention, I provide acylinder withinwhich liquid is to be received, and such cylinder has within the same an overflow pipe, a discharge pipe, and a pipe to permit a filling of the cylinder with liquid from a source of supply. Stopsare' provided so that a measured quantity of liquid may be dispensed from the cylinder. I so arrange the various elements of my device that, assuming that a certain number of gallons of liquid have been dispensed from the cylin der and it is desired to again fill the tank, the discharge tube should first be raised, after which the indicator is set to Zero, at which time the cylinder may befilled with liquid, whereupon the indicator may be set to the number of gallons of liquid to be dispensed, after which the discharge tube may be dropped until the determined amount of liquid has been discharged therethrough. Each step as outlined above must be performed, and various mechanism is utilized to lock certain of the apparatus so that the iudicatorcan not be set until the discharge tube has been raised, nor, for that matter, could liquid be received within the cylinder until the discharge tube'had been raised.

The invent-ion contemplates a novel pump incorporating and requiring a sequence of steps for its operation and which provides a fool-proof device as far as operation is concorned: and with the above and other-objects in view the invention consists in the novel and useful provision, formation, constructioo. association and relative arrangement of parts. members and features, all as shown in certain of its embodiments in the accompanying drawings, described generally, and more particularly pointed out in the claims.

In the drawings:

F igure 1 is an elevation partly in section of pump incorporating the invention;

Figure 2 is an enlarged fragmentary crosssectional view of the mechanism for raising and lowering the discharge tube of the pump;

1924. Serial No. 721,808.

Figure 3 is an enlarged fragmentary crosssectional view of a valve for controlling the filling of the pump tank;

F igures 4 and 5 are top and side elevations, respectively, on an enlarged scale, of means for preventing the discharge tube from being lowered within the pump cylinder until the indicator is set; Figure 4 being as viewed 1n Figure 1, Figure 5 as viewed from the opposite side of the showing of Figure 1;

F igure is a fragmentary top plan view of an eccentric lock used to bear against a plate member associated with the indicator stop rod, the said view being a top plan view of the showing of Figure 5; the view point being the same as of Figure 4;

F1gure 7 is a fragmentary cross-sectional view on an enlarged scale, showin the valve for raising and lowering the disc arge tube within the pump cylinder;

F igure 8 is an elevation partly in section on an enlarged scale, showing the indicator member and means controlled by the indica tor member for locking the filling valve shown 1n Figure 3 against movement; and,

F gure 9 is a further fragmentarycross sectional view of the filling valve shown in F1 ure 3.

' orresponding parts in all the figures are designated by the same reference characters.

Referring now with particularity to the drawings, the improved pump is designated as an entirety by A, and said pump includes n the showing a base member a upon which is mounted a jacket band the said jacket carries a'tqpplatec. Supporting columns d are mounte in connection with the base and top plate and carry a dome shaped member e, which. dome shaped member in turn is adapted to support a cylinder f formed of some transparent material such as glass, and the top of such cylinder carries a cap 9, which cap is provided with a vent opening h. reserve tank designated as j is adapted to receive liquid, such as gasoline, and a pi e 1 communicates between tank j and manifo d tube 2. Means 3 filters the gasoline in its passage upwardly through pipe 4, which pipe is received within the-cylinder f. r The pipes 1 and 4 are designated as the supply pipes. A flap valve 5 is included within the pipe '1 so that gasoline lifted through the supply pipe cannot from any cause flow back into thesupply tank j. Anoverflow pi 8 is contained within the cylinder f an maintained-ata certain height therein, namely, at a zero indication, and a lower portion of such overflow pipe is seated within the dome e and connects with an overflow manifold portion 9 of such dome, the overflow manitold in turn being connected with an overflow and drain pipe 10 communicating with a tank 11 commonly called the filling tank, such tank 11 being ordinarily sunk beneath the surface of the ground and being the tank that is filled from the surface of the ground through apipe as shown at 12, liquid from such tank 11 being conducted to the supply tank j through'suitable piping means shown at 13. A discharge tube is formed in two parts 1 1 and 15, the part 14: being movable relative to the part 15, is adapted to control the discharge of any liquid from within the cylinder, and theliXed discharge tube 15 is joined with a discharge manifold m, the said discharge manifold in turnbeing associated.

with a service connection 16 passed through the dome c, which service connection lncludes valve control means 17. Means designated as B is provided for raising and lowering the discharge tube 14-, as well as means. C for controlling the filling of the cylinder with liquid through the pipes 1 and 4;. A tank adapted to contain compressed air is shown at 20 and a pipe 21 leads from such tank to an air reducing valve 22 and thence to the means 0. A branch pipe 23 is connected to the pipe 21 and leads to the means B. The raising and the lowering of the dis charge tube within the cylinder f is accomplished through operation of the means in the following manner: Referring to Figure 2, the tube 15 carries at the lower end thereof a member 24, which member is in the form of a flanged collar having screw threads 25 adapted to carry a nut member 26 having ports 27 and 28 therein.' A cylinder 29 carried at one end by the nut 26, is concentric within the tubes 14 and 15, an d in communication with the port 28. The top of the cylinder is provided with'a stufiing box cap and nut 30, through which stu'liing box cap and nut is passed a stem 31 forming a part of a piston received within the cylinder 29, said piston being provided with a piston head 32 at an end thereof, and the opposite end of such stem 31 joined to a cap 33 fixed to the upper end of the discharge tube 14:. This cap is reservoir 41 is in con'nnunication with the port 27 through the medium of a pipe 43. These reservoirsmay contain a fluid such as oil, and such reservoirs in turn communicate through the medium of pipes 44. and 45, see Figure 1, with the means B. The means B includes a casing within which are two ball valves designated generally as 51 and 52, and the said casing is provided with two ports, as 53 and 54,the port 53permitting communication between the ball valve chambers 55 and 56. The pipe 23 is in communica tion with the chambers 55 and 56. The port 5st permits communication between the two chambers 57 and 58 and such chambers in turn are associated with an exhaust pipe 59. It will be noted that both chambers 57 and 58 have portions 60 and 61 of lesser diameter than the portions 57 and 58 so as to form valve seats 62 and 63. The pipe 4-1 is in communication with the chamberportion 60, at 65, and the pipe 45 is in communication with the chamber 61 at 66. It will be noted that the ball valves 51 and 52 are identical in formation and for that reason like char-- acterswill apply. Each valve includes a ball member 67 and a coiled compression spring 68, the coiled compression spring being confined within a cap nut 69 having screw threaded engagement-with screw threads in the walls surrounding their respective valve chambers, and such ball 67 under the influence ofthespring 68 is urged to close a port permitting communication between the ball valve chambers and a chamber immediately above, such as shown at 70 and 71 respectively. Adapted to be received within the chambers 57, 60 and 58, 61 respectively, are valves 72 and 73 respectively. Both of said valves are provided with a tapered portion 7 i-which is adapted to contact with their respective seats 62 and 63, toclose, under certain conditions, communication between the ball valve chambers and the exhaust pipe 59. In this particular the chambers 57 and 58 might be termed the exhaust chambers. Both valves 72 and 73 are provided with stems, 75 and 76, adapted to be passed through the port openings 70 and 71 so as to depress one or the other of the balls 67 of the ball valves. Said casing 50 is likewise provided with a lug v77 to which is pivotally joined a control lever 7 8, said control lever having a portion, as 79, which may bear against a head portion 80 of the valve 72 to depress the same when the handle is raised upwardly, and with a portion 81 adapted to depress the head 82 of the valve 73 when the handle is pushed downwardly. If the handle is raised upwardly, as shown in Figure 7, it will be noted that the ball 67 will close communication between the chambers 56 and 61, whereas the valve 72 will be depressed and the taper portion thereof will close communication between the chambers 57 and 60 and depress the ball 67 in the valve chamber 55 so that com ressed air may be led through chamber 55 t rough the port 71 and thence into the pipe 44 through the connection of such pipe with the chamber 60 as shown at 65, and thence the-compressed air will be led to the top of the cylinder 40 as shown in Figure 1, and if such cylinder contains oil or other fluid the fluid will be forced through the port 28 and into the cylinder 29 bearing against the piston head 32, which will force the piston head upwardly within the cylinder 29 and thus raise the discharge tube 14 through the medium of the stem 31 connected with such piston head 32. It will be noted that air pressure on the opposite side of the piston head is relieved, and if oil is contained therein it is allowed to flow back through the tube 38 into the reservoir 41 for the reason that the ipe 45 connecting with the upper portion 0 such reservoir 41 is in communication with the chamber 61 and such chamber 61 is in open communication with the chamber 58, such chamber 58 in turn being in communication with the exhaust pipe 59 through the medium ofthe port 54. It is to be recalled that the ballvalve has closed the port of communication between the chamber 56 and such'chamber 61. Obviously, moving the operating handle 58 downwardly would cause the rocedure to be reversed, that is, fluid woul be admitted under pressure to the top. of the cylinder 29 and force the piston head back downward, carrying with it the discharge tube.

A stop rod 0 extends from the dome g to the top plate a and said plate 0 has mounted above the same and associated with the stop rod a meter-counter p illustrated in Figure 8, it being noted that such meter-counter has a dial 90 upon which numbers appear with a pointer 91 adaptedrto play over the graduations on such dial. A lever handle 92 is associated with the stop rod sothat the same may be turned, and mounted on such stop rod adjacent the discharge tube is and within the cylinder f are a series of spaced dogs 93, .the a-ngularity between dogs being equal to certain angularity between indications on the dial 90. Thus it is possible to discharge a given amount of gasoline or other liquid from the cylinder in accordance with the meter-counter setting. A plate 94 is included between the cap 9 and the top of the cylinder f and rests on a top ring 95 and the stop rod 0 is passed through such plate 94. Carried on the stop rod and above the plate 94 is a disk 96, see Figure 5, and spaced below the plate 94 and carried on the stop rod is a second disk 97 provided with a slot 98. Pivotall'yI mounted at 99* on and above the plate 94 and adjacent the periphery of the disk. 96 is an eccentric lock 99, see Figure 6. This eccentric lock includes a lever 100 formed with a cut-away portion 101 and with a nose portion plate 94 and provided with a boss portion 104 carried on a guide rod 105, which guide rod extends from the plate 94'to the dome 6. It is intended that this guide rod should be passed through the opening 37 in the cap 33 so as to guide movement of the discharge tube. The means 9 is likewise formed with an enlarged boss portion separating the bent portions of such means, as shown at 106. The head of the means (1 is formed with a nose or cam portion 107 and such nose or cam portion carries a stud or the like 108. Immediately below the boss'104 and carried on the guide 105 is a member 109 provided with an extension 110. and the enlargement 106 is provided with a perforated car 111, and extending between such perforated ear and an end of the member 110 is a coiled spring 112. Thus it will be seen that the stud 108 which projects below the bottom of the bent lever is caused to engage the periphery of the disk 97 and when such disk is rotated, being rotated when the indicator is moved. the stud may enter the slot 98 as shown in Figures 4 and 5. The said stud will enter such slot when the indicator pointer is set to zero. The means q is provided with a lock 113, which lock comprises a stud 114 providedvwith a flanged head 115 and whichstud is united with the means (7 at the enlarged portion 106 thereof. After the discharge tube has been raised to its maximum height, the indicator pointer 91 may be set to a zero indication on the dial 90 for-the reason that the cap member 33 carries a pin 116 provided with a pointed head 117. This pin projects above the cap and is adapted to pass through an opening in the plate 94 and engage the wall surrounding the cut-away portion 101 of the lever 100 forming a part of the eccentric lock 99, and when it does so engage such portion the pointed head 117 cams the lever inwardly andreleases the nose portion 102 from the periphery of the disk 96, permitting the stop-rod to he rotated. When the stop-rod is turned so that the indicator pointer is back at zero. the disk 97 will be rotated counter-clockwise from the showing of Figure 4 and the stud 108 will enter the slot 98 of such disk 97, at which time it will'be noted the flanged head 115 will be moved into a position so that it will be beneath thecap 33 and engage the flange 34.

means Q through the medium of cooperative working parts, securely locks the discharge tube lagainst movement downwardly when the indicator pointer is set at a zero indication. When the indicator pointer is set at a zero indication it is possible to fill the tank 7 with a fluid from the source of supply by means C, but until it is set at zero it is impossible tofill the tank because said means C is then looked as will be hereinafter more fully described. The means C is illustrated in detail in Figures 3 and 9. Such means C includes two casing members and 121 which may be joined together by screw threading or otherwise, as shown at 122, such casings being secured and carried by the top plate 0 as by means 123. .The casing 120 is provided with a chamber 120 and carries a valve cap member 124, which cap is pro vided with ports 125 and 126. The port 126 communicates with a valve r, which valve controls the admission of air under pressure into the chamber portion of the casing 120. Said valve 1' is conventional in form, including a casing having two chambers with an ordinary poppet 127 operated through the medium of a lever 128 to permit or prevent communication between such chambers and a tube 129 which connects with the air reducing valve 22. The port 125 communicates with a member 130 formed with a ball seat 131, and a ball 132 forming a valve is adapted to rest on such seat 131. A bore 133 permits communication between the chamber 120 of the casing 120 and a chamber 134 in the casing 121. The casing 121 is likewise formed with chambers 135 and 136 with valve means 137-and 138 for controlling communication between thechambers 135 and 136 and 134 and 135. A pipe 139 communicates with the chamber 135 and the liquid supply tank j, and a pipe 140 communicates with the chamher 136 and the tube 129 which leads to the reducing valve 22 and thence by pipe 21 to the tank 20 containing compressed air. A stem 141 carries a piston 142, which piston is within the chamber 120, and such piston includes two spaced flange members 143 and 144 as well as the usual packing or gland 145. The stem 141 is formed with an enlargement 146 where it is passed through the bore 133. and such enlargement carries at its lower end a packing gland 147 which under certain conditions is'seated' on a valve seat 148 so as to. either permit or prevent communication between the chambers 134 and 135. The said stem continues through the chamber 135 and is passed through an opening 150 in'the wall 151 divisioning the chambers 135 and 136. Thesaid stem is in part provided with a longitudinal bore 152 leading through the upper end thereof into the chamber 120 and with a port 153 in communication with such bore 152, which port 153 is in communication with the chamber 135. The casing121is provided at its lower, end portion with a cap nut '154 should at all times urge the valve 137 to seat so as to prevent communication between the chambers 135 and 136th'rough the bore 150. An exhaust pipe is in communication with the chamber 134. A small transverse port 161 permits atmospheric communication with the lowermost portion of the chamber 120. Carried on the cap 124 is a member 170, which member supports a tube 171 which tube extends to a point adjacent the dome g. The member is provided with two bores 172 and 173 and a float designated generally by 174 is carried by across-arm 175 mounted on the tube 171. Said float includes an arm 176 pivoted as at 177 to such cross-arm 175. A tube or rod 178 extends through the tube 171 so that an end of the same as 179 will bear against a surface of the ball 132 and seat the same as shown in Figure 3, when the float is in the position shown in Figures 1 and 3, the said tube being curvedly bent, as shown at 180 and associated with the lever 17 6 as shown-at 181. Thus upward movement of the float 174 will lift the rod 178 upwardly. A tube 182 is in communication with the port 173 and such tube leads to the atmosphere.

The meter-counter is provided with a casing 200 within which is means E which functions as a means to prevent a filling of the cylinder until the meter indicator lever is set to Zero. The said means comprises a bolt 201 passed through the casing 200,'which bolt is normally urged outwardly of such casing by means 202 so that an end of such bolt as shown at 203 would normallybe received between the flanges 143 and 144 as shown in Figure 9; A lever 204 is pivoted as at 205 to the casing and an end portion 206 of the lever, is associated with the bolt 201 through the medium of an extension 207. The stop rod 0 has associated therewith within the casing 200 a disk bearing a projecting lug 208 which will contact with an end of the lever 204. when the pointer 91 is set to zero indication on the dial and retract the bolt within the casing and from between theflanges 143 and 144.

The operation of the device as just described is as follows Assume that the stop lever 92 has been turned so that the stop rod projects the second dog 93 into a position to engage the flange, 34 of the cap 33, as shown in Figure 2, and also that two gallons of liquid, such as gasoline, have been delivered through the service connection 16. Reference to Figures 8 and 9 will show that thelock bolt next customer for gasoline should desire tenv gallons of gasoline, the tank 7 should be refilled, and to refill such tank the lever 78 of Figure 7 is pressed upwardly, which will admit air through the pipe 23 and the valve 72 into the pipe communicating with the cylinder 40, which cylinder may contain oil or other substance, to raise the piston head 32, said cylinder at the same time having the pressure relieved fromthe opposite side of such piston head through the medium of the valve 73, which permits communication from the medium of the exhaust pipe 59. The stem 31 cylinder 41 with the atmosphere through the associated with such piston head 32 will raise the discharge tube'to a height where the pin 116 will contact with the eccentric lock 99 and release the same from the periphery of the disk 96. lVhen this occurs the pointer 91 may be set to a zero indication on the dial and it is to be noted that until such discharge tube reaches a predetermined level known as zero in the cylinder that such pointer 91'can not be moved to Zero indication at all, beingheld against movement by the eccentric lock 99 bearing against the periphery of the disk 96, which disk is associated with the stop rod 0. As stated, when the discharge tube reaches its maximum height or predetermined height in the cylinder, the eccentric lock is released, whereupon, upon turning the pointer to a zero indication, the bent lever constituting a part of the means 9 is permitted to enter the slot 98 in the disk 97 and at the same time the flanged head 115 engages beneath the flange 34 of the cap 33 and prevents the dis charge tube from dropping. It is also to be noted that the stud 208 (see Fig. 8) will contact with a portion of the lever 204 and retract the bolt 201 constituting apart of the means E. The filling of the cylinder may.

now take place. A depressing of the valve lever 128 of the valve T will admit compressed air to the chamber 120 and force the piston downwardly within such chamber, which downward movement will cause the stem to release the valve 137 so that communication is permitted between the chambers 135 and 136. As the tube 140 communicates with the source of air supply and the tube 139 leads to the tank containing liquid such as gasoline, gasoline will be forced upwardly through the pipe 1 within the cylinder f to fill the same. It is also to be noted that communication between the chambers 134 and 135 is closed while the tank is filling and that the ball valve 130 is likewise closed, being held closed by the weight of the float 174. As the cylinder is filled with liquid the float 174 gradually rises until weight is relieved from the ball 130, at which time the pressure of the air within the chamber 120 will lift such ball from its seat and permit air to escape pastsuch ball through the pipe 182, and when this occurs the spring 158 will urge the valve 137 to seat and close communication between thecham bers 135 and 136and open communication between the chambers 134 and 135. Opening of the valve 138 controlling communication between such chambers 134 and 135 will permit.

the tube 139 leading to thegasoline tank to be under atmospheric pressure as such chamber 135 communicates with the pipe 160 which is an exhaust pipe, further gasoline will not be through the ports 153 and 152 in the stem141 into the chamber 120, as soon asthe piston l45 has moved sufliciently downward to unseat the, valve 137. Thus should the ,valve 1' be released before the piston 145 has entirely completed its movement, air under pressure entering through the pipe 140 will serve to complete the same, forcing the packing 147 against its seat 148, closing the passage between the chambers 135 and 134. lVhen the indicator pointer 91 is again moved to an indication designating the amount or quantity of liquid desired to be dispensed, the lock bolt 201 constituting a part of the means E is released so that the same is received between the flanges 143 and 144, which will then hold such piston so that the same could not be depressed and the valve 137 will close communication between the chambers 135 and 136' as shown in Figure 9. Thus a depressing of the valve lever 128 of the valve 1- would produce no eflect whatever and the tank could not be filled after the indicator pointer was once set to some indication other than zero. After the indicator pointer 91 has been set to the desired indication, indicating the number of gallons of liquid to be dispensed, it will be noted that the flange head 115 is moved from its engage- I ment'with the flange 34 of the ca 33 so that the discharge tube may be droppe upon a depressing of the lever 78, such depression f0rcing air under pressure into the cylinder 41, which cylinder, if it contains liquid, will force such liquid against the top of the piston 32 and at the same time relieving pressure from the opposite side of such piston through cylinder 40, pipe 44, valve 72 and pipe'59 so that the piston will be moved downwardly along with its stem 31, carrying with it the discharge tube, and such discharge tube will move a distance depending upon a setting of the indicator which will likewise set one of the indicator dogs 93 so that it will engage with the flange 34 as shown in Figure 2, and liquid will then pass through such discharge tube and outwardly through the service connection 16.

It is obvious that various changes and modifications and variations may be made in practicing the invention, in departure from the particular showing, without departing from the true spirit of the invention. 7

Havmg thus disclosed my invention, what I claim and desire to secure by Letters Patent ceived therein,'a' piston within said cylinder and connected to said discharge tube, and means for operating said piston to raise the discharge tube. v p

2. In a device of the character disclosed, a discharge tube, a cylinder telescopically received therein,a piston within said cylinder and connected to said discharge tube, and means for operating said piston to raise and lower the discharge tube.

3. In a device of the character disclosed, an elongated cylinder, a discharge tube telescopically surrounding said cylinder, a piston within the cylinder and connected to the discharge tube, means for operating said piston to raise and to lower the discharge tube, and means rendering the last named means inoperative when the discharge tube has moved a.

determineddistance.

4. In a deviceof the character disclosed, a source of air supply under pressure, a dis charge tube, a cylinder telescopically received within said discharge tube, a piston within said cylinder and connected with the discharge tube, and means of connection between the cylinder and said air supplyunder pressure whereby the piston may be raised or lowered to raise or lower the discharge tube.

In testimony whereof, I have signed my name to this specification.

I CURTIS H. EDWARDS. 

